Quick-break double-throw switch



F- ZENKER. QUICK BREAK DOUBLE THROW SWITCH.

APPLICATION FILED JUNE 1, 1918- 1,400,400.

. Y m 1 R E T O N F. R 3 H 1 1 Q v f? n l S A b T N 6 H l D w d 2 e m 6 M P 2 VIA. r ll ///U F. ZENKER.

QUICK BREAK DOUBLE THROW SWITCH.

APPLICATION FILED JUNE 1, 191B.

Patented Dec.13, 1921.

2 SHEETS-SHEET 2- K l l.

INVE TOR ATTORNEY UNITED STATES PATENT oFFIc.

rminmcx ZENKER, or HIGHLAND PARK, MICHIGAN, ASSIGNOR T s iIA D COMPANY, or DETROIT, MICHIGAN, A CORPORATION or MICHIGAN.

QUICK-BREAK DOUBLE-THROW SWITCH.

Specification of Letters Patent.

Patented Dec. 13, .1921.

' To. all whom it may concern ing at Highland Park,

Be it known that I, FREDRICK ZENKER, a subject of the Emperor of Germany, residin the county of Wayne and State of Michi an, have invented certain new and useful mprovements in Quick-Break Double-Throw Switches, of which the following is a specification.

My invention relates to double throw switches of the quick break type, one of the objects of the invention being to provide an inclosed switch which may be operated by an external handle or operating member and is adapted to have a quick break at either of itsextreme positions.

A further object of the invention is to simplify the construction of quick break double throw switches.

A further object of the invention is to de- I sign a quick break double throw switch in such a manner that a very rugged structure results.

A further object of this invention is to so arrange the movable and stationary contacts that an intermediate or neutral position may be secured.

One of the many possible forms of the invention is shown in the accompanying drawin s, in which igure 1 is a perspective view of the quick break double throw switch; and.

Fig. 2 is a medial sectional View of the double throw switch mechanism.

Referring to Fig. 1 of the drawings, it will be seen that the switch is inclosed in a casing 1 having the usual hinged cover 2 and is provided with an operating member or crank 3. Such crank 3 is rigidly connected, and

in the example shown, integrally connected with an internal-operating member 4:. The member 41, it will be seen, is pivoted in the main or body portion of the casing at either side and approximately central thereof. This member 4 is adapted to impart its motion to the switch blades 5 through the medium of an operating lever 6 pivotally connected at 7 to a yoke 8. The yoke 8, it will be seen from referenceto both Figs. 1 and 2, has a sliding connection through the slotted portion .9 with the cross heads 10. Such cross heads 10 are provided at their outer portions with insulating bushings 11 and clamping members 12' fastening such cross heads to the switch blades 5 as clearly shown at the upper right of Fig. 1. Upon reference to Elg. 2

ably carried in a slot 16 in the yoke 8. The r object of this slot 16 is to motion of the pins 15 in reference to the yoke 8 when the upper portion of the slot 9 engages one of the cross heads 10, whereby the springs 13 are not placed under compressive .strain.

From reference to Fig. 2 it will be seen that the two arms or blades 5 are integral and form a widened V, pivoted at the base of the V at 18 to a central contact 19. In the example shown, two such blades and two such central contacts are illustrated. Contacts 20 cooperating with the blades 5 are provided at the outer portion of the insulating base 21.

The operation of this device is as follows:

on the'operating crank 3 is moved toward one limit of motion the pivoted lever 6 is rocked over in such directlon and one of the shoulders 22 thereof engages a pin or stud 23 upon the operating member 8. This causes the operating member 8 to slide along the cross heads 10 until the upper portion of the slot of one of such members engages one of the cross heads and forces it down and the attached blades into engagement with thestationary contacts. Now if the operating member 4 is moved in the opposite direction, the frictional engagement between the stationary spring contacts 20 and the blades 5 will resist the withdrawal of the blades 5.' .Th1s will cause the lever 6to-1nove over and engage the other pin 23 through the medium of its shoulder 22 and will thereafter cause the yoke'8 to slide along the cross heads 10 provide for sliding the contacts 20 diminish to such a point that;

the spring 13, which is elongatedduring this process, can overcome such resistance, the blades 5 are suddenly withdrawn from final engagement with the contacts 20. This ob- I viously causes a quick break.

It will be seen from a reference to the two figures in the drawing that both sides of'the switch mechanism are identical, or, in other words, the two portions on either side of the center plane are symmetrical and operate in.

identically the same manner, and therefore a description of one side will obviously be sufficien t From the above description it will readily be seen that applicant has provided a double throw switch in which the operating crank 3 through the medium of the operating tacts, #It will further be noted that spring mechanism" is provided whereby when the bladeshave become positively withdrawn to a certain extent from the fixed contacts, quick break orspring snap is secured.

The above detailed description and draw-- ings are t be interpreted in an. allustrative manner and not nia l1m1t1 sense, as the is only one of the many posslble forms that applicantsinvention --mayv take; and, there'- fore, such invention is to'be limited only as defined by the followin claims.

Having thus described the invention what is claimed-as new and desired to secure by Letters Patent of the United States-is 1. A quick break double "throw switch comprising stationary and cooperating movable contacts, me'ans for operating-said movable contacts and causing a quick break, including a yoke supported by the movable contacts anda lever pivoted thereon. a

2. A quick break double throw switch movable contacts, means for operating sai movable contacts and causing a quick break, including a yoke supported by the movable contacts and a lever pivoted thereon and loosely connected to said yok comprising stationary and cooperating 3. A quick break double throw switch movable contacts, means for operating sai movable ,contacts and causing a quick break, inclndlng a yoke} and lever p1voted thereon, said lever being provided with, shoulders and cooperating pinson said yoke. 1

4. quick break double throw switch comprising stationary and cooperatin movable contacts, meansfor operating sai movable contacts and causing a quick break, including a oke and a lever pivoted thereon and provl ed with" shoulders and cooperatmg pins on said yoke, and only one pin and shoulder adapted to cooperate at one time.

5. A quick break double throw switch comprising stationary and cooperating movable contacts, said movable contacts comprising V-shaped blades and connecting break, including a, yoke, said yoke having slots therein through which said cross heads pass and having both yielding and positive engagement with said cross heads, whereby quick-break is secured, and an operating member pivoted to said yoke but being capable of lost motion with respect thereto;

7. 'A quick break double throw switch comprising stationary and cooperating movable contacts, said movable contacts comprising V-shaped blades and connecting .cross heads, means for securing a quick break, including a yoke, said yoke having slots therein through which said cross heads pass,'and springs connected to said cross cross heads, and an operating member having a lost motion connection'with said yoke. 8. A quick break double throw switch giompri'sing a plurality of stationary and inovable. contacts, cross heads connecting said movable contacts, a yoke having slotted armsengaging the cross heads and adapted to contact with the cross heads. at the upper v and lower ends ofithe slots, springs connecting said cross heads and yoke, and lost motion means for operating said yoke.

9. A quick break double throw switch comprising a. plurality of stationary and movable contacts, cross head's connecting said movable contacts, a yoke having-arms provided with slots engaging the cross heads and. adapted to contact with the cross. headseads and yoke, whereby. said yoke has both positiveand yielding connections with said springs connecting saidcrossyoke, and means for operating said yoke, ineluding a pivotedlever which-is capable of lostmotion with respect to said yoke.

, 10. A quick break double throw switchcomprising a plurality of stationary and' movable contacts, cross-heads connecting said movable contacts, a yoke having arms pro- =vided with slots engaging the cross heads and adapted to contact with the cross heads at the upper and lower ends of the slots,

springs connecting said :cross heads and yoke, and means for operating said yoke, said means including a ivoted lever provided with shoulders and cooperating pins on said yoke.

11. A quick break double throw switch comprislng a plurality of stationary and .movable contacts, cross heads connecting said movable contacts, a yoke having arms provided with slots engaging the cross heads and adapted to contact with the cross heads at the upper end lower ends of the slots, springs connecting said cross heads and yoke, and means for operating said yoke, said means including a rock arm, and a cooperating forked lever pivoted to said yoke.

12. A quick break double throw switch comprising a plurality of stationary and movable contacts, cross heads connecting said movable contacts, a yoke having arms provided with slots engaging the cross heads and adapted to contact with the cross heads at the upper and lower ends of the slots, springs connecting said cross heads and yoke, and means for operating said yoke, said means including an operating member and a cooperating forked pivoted lever provided with shoulders and cooperating pins upon said yoke.

13. A quick break double throw switch comprising a plurality of V shaped centrally pivoted movable contacts, sets of fixed contacts cooperating with the ends of the movable contacts, a crosshead insulatively interconnecting the movable contacts at each end of the V, and means for operating such movable contacts comprising a yoke loosely coupled. with the crossheads and a spring positively connected to each of the crossheads, and loosely connected to the yoke.

1 A quick break double throw switch comprising a plurality of V shaped centrally pivoted movable contacts, sets of fixed contacts cooperating with the ends of the movable contacts, a crosshead insulatively interconnecting the movable contacts at each end of the V, and means for operating such movable contacts comprising a yoke loosely coupled with the crossheads and a spring positively connected to each of the crossheads, and loosely connected to the yoke,

said yoke being V shaped and the center of the V shaped yoke being remote from the central pivot of the blades.

15. A quick break double throw switch comprising a plurality of stationary and movable contacts and cross heads connecting said movable contacts, an operating member, a yoke cooperating with said operating member and cross heads and having a lost motion connection With both the cross head and the operating member, and having a resilient connection with said cross heads, whereby a quick break is secured.

16. A quick break double throw switch comprising a plurality of stationary and movable V-shaped contacts, cross heads connecting said movable contacts, an operating member, interposed means between said operating member and said cross heads for loosely connecting both the operating member and cross heads whereby 'the movable contacts are both positively and yieldingly operated by the operating member in unison, and whereby the cross heads are also resiliently coupled with the said means.

FREDRICK ZENKER. 

